Class 338/225 - Carbon particles

Subclass of Class 338 - Electrical resistors
Definition: Subject matter wherein the granular or powdered material
No. of patents: 31
Last issue date: 01/22/2008

Number	Title	Issue Date
7320762	Polymer compound with nonlinear current-voltage characteristic and process for producing a polymer compound The polymer compound contains a polymer matrix and a filler embedded in the matrix. The filler comprises two filler components with nonlinear current-voltage characteristics deviating from one another. By selection of suitable amounts of these filler components, a p...	01/22/2008
7315011	Magnetic heating device Magnetic heating device includes energy feeding elements, control unit and at least two magnetic field generators, where each magnetic field generator has two free ends. All free ends of the magnetic field generators define a plane and the control unit is adapted to...	01/01/2008
7217374	Resistance element, method of manufacturing the same, and thermistor To provide a resistance element having an electric resistance body with excellent stability and a method of manufacturing the same. The resistance element includes an electric resistance body, on a base body surface, consisting of a carbon nanotube structure layer	05/15/2007
7034652	Electrostatic discharge multifunction resistor The present invention provides a multifunction resistor having an improved voltage variable material (“VVM”). More specifically, the present invention provides a polymer VVM that has been formulated with a high percentage loading of conductive and/or semiconduct...	04/25/2006
7008991	Thermoplastic resin composition The present invention relates to a thermoplastic resin composition comprising two different thermoplastic resins (component A and component B), conductive carbon black (component C), and conductive carbon black having a larger specific surface area than that of comp...	03/07/2006
6872924	Electric heater assembly An electric assembly using powdered media for generating heat. ...	03/29/2005
6542067	Barium titanate semiconductor ceramic powder and laminated semiconductor ceramic device A compact and low resistance laminated semiconductor ceramic device which is provided with a positive resistance-temperature characteristic and has a broad resistance-change range and a high breakdown voltage in addition to ohmic contact between semicondu...	04/01/2003
5534843	Thermistor An insulating glass layer covers the surface of a thermistor element except at the two end surfaces. The insulating glass layer is partially or fully composed of crystallized glass. A terminal electrode is integrally formed on both end surfaces. The termi...	07/09/1996
5509558	Metal oxide resistor, power resistor, and power circuit breaker A metal oxide resistor for suppressing variations in resistivity in use in an atmosphere at a high temperature or humidity. Such a metal oxide resistor includes a sintered body in which carbon particles having an average grain size of 1 μm or less exist ...	04/23/1996
5218335	Electronic circuit device having thin film resistor and method for producing the same In an electronic circuit device, a thin film resistor is formed on a substrate and includes first regions including one kind of atom such as Cr and exhibiting an electric conductivity and a second region including a compound such as SiO2 compos...	06/08/1993
4961064	Oil leakage sensor An oil-leakage sensor formed from a porous water-repellent resin admixed with fine electrically conductive carbon particles coated with a water-repelling layer....	10/02/1990
4907340	Electrical device comprising conductive polymers A process for preparing an electrical device which comprises a conductive polymer exhibiting PTC behavior. The device is irradiated by use of an electron beam at an average dose rate of less than 3.0 Mrad/minute. The cross-linking may be to a level of 50 ...	03/13/1990
4749981	Resinous resistor A resinous resistor made of a blend of a thermoplastic non-polar resin, a thermoplastic polar resin, graphite and carbon black. The volume inherent resistance value of the resistor can be precisely controlled to a predetermined value. The resistor is unif...	06/07/1988
4737618	Heating element for a defrosting device for a wing structure, such a device and a process for obtaining same An electric resistance element (1) in a device for deicing a wing structure such as the wing of an aircraft or the blades of a helicopter, which includes conducting fibers embedded in a composite fiber structure and power supply wires connected electrical...	04/12/1988
4560428	System and method for producing cured composites System and method for producing a composite, particularly applicable for repairing damage to a structural component, wherein an electrical resistance heating element basically in the form of a layer of conductive carbon or graphite, e.g., in fiber form, b...	12/24/1985
4470034	Electrical resistor structure An electrical resistor is described which is comprised of a resistor core having at least one electrically conductive end cap mounted thereon. The end cap is in electrical contact with the butt end portion of the core and electrically insulated from the s...	09/04/1984
4407778	Freon gas detecting element Freon gas detecting element for detecting the presence of freon gas with of a pair of electrodes, a gas detecting body made of a metal oxide semiconductor and covering the pair of electrodes, and a catalytic layer coated on the gas detecting body. The cat...	10/04/1983
4345236	Abrasion-resistant screen-printed potentiometer An abrasion-resistant screen-printed potentiometer includes top and bottom resistive layers screen-printed on a substrate. The resistivity of the top layer is substantially greater than the resistivity of the bottom layer. A slide arm is in pressure conta...	08/17/1982
4310747	Method and apparatus utilizing a porous vitreous carbon body particularly for fluid heating A body of a specially prepared, porous vitreous carbon which does not crack or substantially change in electrical resistance with time when heated to elevated temperatures in air and which is used in a method or apparatus to heat a fluid stream flowing in...	01/12/1982
4301356	Heating unit and method for production thereof Heating unit capable of generating heat upon the passing of an electric current, which comprises a matrix of a hardened hydraulic material and electrically conductive fibers dispersed therein in an amount sufficient to impart electric conductivity and a m...	11/17/1981
4292505	Furnace for generating heat by electrical resistance A furnace having a body in which electrically resistive material is positioned between two electrodes so that heat can be generated by passing a current through the material. The resistive material is a mixture of carbonized plant material and a non-organ...	09/29/1981
4257157	Porous electrical resistance heaters A method of manufacturing a fluid permeable electrical resistance heater element having a structure that promotes uniformity of flow of fluid through the element and a uniformity of heating throughout the element. The method comprises forming a fluid perm...	03/24/1981
4250398	Solid state electrically conductive laminate A unitary, composite laminated article comprises an electrically insulating top layer and an electrically insulating bottom layer. Applied to the inner surfaces of each of these layers is a barrier layer substantially impermeable to moisture and water vap...	02/10/1981
4250397	Heating element and methods of manufacturing therefor The heating element includes a flexible graphite fiber-loaded impregnated paper saturated with a binder to ensure and maintain intimate electrical contact between the graphite fibers. In one form, two segments of the graphite fiber-loaded paper are couple...	02/10/1981
4237441	Low resistivity PTC compositions Compositions which exhibit PTC behavior with a switching temperature (Ts) above 0° C., which have a resistivity at a temperature below Ts of less than 7 ohm. cm, and which comprise a crystalline polymer and a particulate filler comp...	12/02/1980
4225559	Ceramic element sensor An improved sensor having a ceramic element that undergoes a change in an electrical characteristic in response to a change in the partial pressure of oxygen in a mixture of gases to which the ceramic element is exposed. Sensors of this type are used to d...	09/30/1980
4220846	Method and apparatus utilizing a porous vitreous carbon body particularly for fluid heating A body of a specially prepared, porous vitreous carbon which does not crack or substantially change in electrical resistance with time when heated to elevated temperatures in air and which is used in a method or apparatus to heat a fluid stream flowing in...	09/02/1980
4082997	Oil detecting device The present invention provides an oil detecting element capable of accurately detecting oil floating on water. The oil detecting element comprises a water-repellent, oil-passing filtering member for preventing water coming into the element. Oil can be det...	04/04/1978
4071736	Defrosting mirror The specification discloses a defrosting mirror especially adapted for outdoor use such as on the exterior of vehicles. The mirror includes an electrically conductive, resistive coating applied to a surface of a light reflective mirror element. The coatin...	01/31/1978
4061827	Fibres An electrically conductive fibre formed from a thermoplastic organic polymer and having a zero or positive temperature coefficient of resistance. It is produced by the sequential steps of embedding and/or dispersing electrically conductive carbon particle...	12/06/1977
3970817	Hazardous leakage current preventing for refractory-encased heater elements Low-level "trickle" electric heater means in diverse forms prevents hygroscopic moisture accumulation adjacent relatively open or exposed ends of refractory-encased conventional electrical heating elements, thereby to prevent excessive leakage current thr...	07/20/1976

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Class 338/225 - Carbon particles